Description of the centering target
1. Centering cross (orange cross) and boxing center of the shape (blue cross)
2. Graduated axis mark
The horizontal line is located at 6 mm and allows you to measure the PRP (Prism Reference Point)
distance.
a. Centering a lens using re-marked micro-engravings
Prerequisite:
• Remove all the original markings,
• Re-mark the micro-engravings with the marker; the diameter of points must be between 0.5 and 1.5
mm.
We advise you to use the white felt tip marker supplied with the tracer-centerer-blocker to mark the
lens.
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